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H. TOWNSEND AND w. B. DIXON HOT AIR HEATER. APPLICATION HLED SEPT-4,I917.

v1,309,000. Patented July 8, 1919.

I INvE wRs Jidrl-rl ZZZI/hsend Will/ chm B.- Dixon UNITED STATES PATENTOFFICE.

HERBERT TOWNSEND, F GLOUCESTER, NEW JERSEY, AND WILLIAM 'B. DIXON, 0F 71 NICETOWN, PENNSYLVANIA.

HOT-AIR HEATER;

Application filed. September 4, 1917.

To all whom it may concern Be it known that we, HERBERT TOWNSEND,

a subject of the King of England, residing .vented new and usefulImprovements in Hot-Air Heaters, of which thefollowing is aspecification.

Our invention relates to new and useful improvements in hot air heaters,and has for its object to provide an exceedingly simple and efiectivedevice of this character whereby the air is caused to circulate withinthe heater in a clrcuitous way, so as to be raised to a very hi 'htemperature by absorbing the heat at di erent points, which is thrownoif from the burner.

A still further object of the invention is to provide a heater of theclass described having an outlet opening, above which is situated a hoodor canopy for spreading the hot air and causing the same to flow downward as it leaves the hood.

With these ends in view, this invention consists in the details ofconstruction and combination of elements hereinafter set forth and thenspecifically designated by the claim.

In order that those skilled in the art to which this inventionappertains may understand how to make and use the same, we will describeits construction in detail, referring by numerals to the accompanyingdrawing forming a part of this application, in which- The figure is aview of the heater in vertical section.

In carrying out our invention as here embodied 2 represents the outershell consisting of a bottom 3 having a central opening 4, side walls 5and a top 6. Extending from the bottom wall 3 to a point some distancefrom the top 6, and surrounding the opening 4 is an upwardly projectingstack 7, the same being spaced some distance from the side walls 5.

Within the heater is a partition 8 which is located between the outerwalls 5 and the stack 7, the same being spaced from both the stack andsaid side walls and extending from the bottom 3 to a point adjacent thetop 6 and intermediate the space between Specification of LettersPatent. Patented July 8,

Serial N0. 189,482.

the top of the stack 7 and the top wall 6. The walls of the partitionare provided with openings 10 at the bottom thereof. The space betweenthe partition walls 8 at the top is covered by a top 11 which is spacedfrom the top end of the stack 7 and the top wall 6 of the heater. v

The top wall 6 has an outlet opening 12 which is surrounded by anupwardly projectingflange 13.

The construction of the heaterabove de-- scribed produces a circuitouspassageway consisting of a chamber 14 within the stack 7, the chamber15-, a portion of whichlies above the stack and a portion between thewalls of the stack and the partition 8, the

chamber 16 between the partition walls 8 and the outer walls 5 of theshell and the chamber 17 between the top 11 and the top wall 6, thelatter communicating with the outlet opening 12.

The heater is provided with suitable legs or supports 18 and a burner19. The burner here shown represents an ordinary gas burner, but it isto be remembered that any kind of fuel may be utilized for producing therequired heat, so that this burner may be changed where necessaryaccording to the fuel, which is used.

A hood or canopy 21 is placed over the outlet, and said hood has acentral flat portion 22 and an outwardly and downwardly projectingflange 23, so that the hot air is suing from the heater will-be given adownward motion as it passes from beneath the hood.

In order that the hood may be properly supported above the heater weprovide the same with a depending collar 24 adapted to seat over theflange 13, said collar being of greater length or height than the flange13. and having openings 25 therein located above the flange 13, when thehood is in place.

In practice the air passing into the heater will pass over the flame ofthe burner, since said burner is located directly beneath the thepartition walls 8 and the walls of the stack 7 then from the bottom 3 asit passes through the openings 10 from the chamber to the chamber 16;then from the partition Walls 8 and the outer walls 5, as it passesupward through the chamber 16 and again from the top 11 as well as anyheat that may be contained in the top wall 6 as it passes through thechamber 17 to the outlet 12 from where it is thrown out into the room ina slightly downward direction by the hood 23.

It has been found that as the air passes through the circuitouspassageway formed by the different chambers, the same is sufficientlyagitated or broken up to absorb a great amount of heat, and because ofthe large heating area provided by the construction here shown, the airis raised to a much higher temperature thanheaters of ordinaryconstruction, and it has also been found that because of the largeheating surface that the odor ordinarily thrown off by gas burners isalmost entirely eliminated.

Of course we do not wish to be limited to the exact details ofconstruction here shown, as these may be varied within the limits of theappended claim without departing from the spirit of our invention.

Having thus fully described our invention, what we claim as new anduseful, is-

A hot air heater having a circuitous passageway and provided with anoutlet opening, a flange surrounding said outlet opening, a hood havinga central flat portion and a downwardly and outwardly projecting flangeand a depending collar carried by the hood and projecting from thecentral flat portion thereof and adapted to be placed over the flange,said collar being of greater height than said flange and having openingstherein located above the upper edge of the flange when the collar isplaced thereon.

In testimony whereof, We have hereunto aflixed our signatures.

HERBERT TOWNSEND. WILLIAM B. DIXON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

